Structure of the Atoms Test

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Structure of the Atoms Test - 17

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following sub atomic particle has the highest mass?

A
Neutron

B
Positron

C
Electron

D
Proton

Solution

Neutron is heaviest among all subatomic particles with a mass of 1.0087 amu while proton has a mass of 1.0073 amu. Positron and electron both have a mass of 0.00055 amu.
Question 2
1 / -0

Match the atomic numbers 4, 14, 8, 15, and 19 with a metal of valency 1.

A
4

B
14

C
15

D
19

Solution

Atomic no $$19$$ is potassium with configuration of $$2, 8, 8, 1$$ so it have valency of $$1$$. Also potassium is metal.
Question 3
1 / -0

Valence electrons are those which are present :

A
in the innermost orbit

B
in the penultimate orbit

C
in outermost orbit

D
none of the above

Solution

Valence electrons are electrons that are present in the outermost shell or orbit.
Question 4
1 / -0

Rutherford's scattering experiment led to the discovery of :

A
nucleus

B
presence of neutrons in the nucleus

C
both (A) and (B)

D
revolving nature of electrons around the nucleus

Solution

Since only a few light rays were getting deflected by a large angle in the Rutherford gold foil scattering experiment, he concluded that a highly dense nucleus is present in every atom.
Question 5
1 / -0

The particle used by Rutherford in $$\alpha$$-ray scattering experiment was :

A
neutron

B
electron

C
helium nuclei

D
x-rays

Solution

Rutherford used $$\alpha$$- particles in his scattering experiment which is a helium nuclei.
Question 6
1 / -0

The shell closest to the nucleus of an atom is:

A
M

B
N

C
L

D
K

Solution

The shell closest to the nucleus of an atom is K. The next shells are L, M, N, and so on.
Question 7
1 / -0

Charge on a neutron is __________.

A
0

B
+1

C
-1

D
None of the above

Solution

An electron has a charge of $$-1$$. A proton has a charge of $$+1$$. A neutron has an average zero charge.
Question 8
1 / -0

The element with atomic number 56 is likely to have the same outer shell configuration as the element with atomic number __________.

A
12

B
18

C
14

D
30

Solution

Electronic configuration of the element X is - 2, 8, 8, 18, 18, 2- It has two electrons in outer shell. The element with atomic number 12 also have 2 electrons in its valence shell -2, 8, 2.
Question 9
1 / -0

The space between proton and electron in hydrogen atom is :

A
absolutely empty

B
full of electromagnetic radiation

C
full of air

D
full of ether

Solution

According to Bohr's model of an atom, the space between proton and electron in hydrogen atom is absolutely empty.
Question 10
1 / -0

The fundamental particle which has no charge and has a mass almost equal to that of the positively charged fundamental particle is ________.

A
proton

B
neutron

C
electron

D
$$\beta$$-particle

Solution

The fundamental particle which has no charge and has a mass almost equal to that of the positively charged fundamental particle is the neutron.

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Structure of the Atoms Test - 17

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Structure of the Atoms Test - 17

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SHARING IS CARING

Question 1

Neutron

Positron

Electron

Proton

Solution

Question 2

4

14

15

19

Solution

Question 3

in the innermost orbit

in the penultimate orbit

in outermost orbit

none of the above

Solution

Question 4

nucleus

presence of neutrons in the nucleus

both (A) and (B)

revolving nature of electrons around the nucleus

Solution

Question 5

neutron

electron

helium nuclei

x-rays

Solution

Question 6

M

N

L

K

Solution

Question 7

0

+1

-1

None of the above

Solution

Question 8

12

18

14

30

Solution

Question 9

absolutely empty

full of electromagnetic radiation

full of air

full of ether

Solution

Question 10

proton

neutron

electron

$$\beta$$-particle

Solution

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